Laserfiche WebLink
<br />OD1572 <br /> <br />PROJECT TITLE: Flood-Hazard Mapping (fig. 7) <br />COOPERATING AGENCY: None <br /> <br />PROJECT CHIEF: Theron R. Dosch, District Office, Lakewood <br /> <br />PERIOD OF PROJECT: Continuous since February 1973 <br /> <br />Problem.--U.S. House of Representatives Document 465 outl ines a national pro- <br />gram to provide flood-hazard information. The U.S. Geological Survey has been as- <br />signed the responsibil ity to outline on Geological Survey topographic maps those <br />flood-prone areas that would be inundated by a flood with a 100-year recurrence <br />interval, using information on the maps and data from existing flood-frequency <br />studies. <br /> <br />Objeative.--Del ineate on topographic maps the extent of areas that would be <br />inundated by a flood with a laO-year recurrence interval in and adjacent to com- <br />munities in counties in which flood-insurance studies will not be contracted by <br />the Federal Emergency Management Administration. <br /> <br />Approaah.--Use data from existing flood-frequency studies. Use relations be- <br />tween flood depth, discharge, frequency of occurrence, and drainage area to define <br />flood profiles and flood boundaries (lOO-year recurrence interval) along streams <br />for which data from historical floods mayor may not exist. Use regional flood- <br />depth frequency relations where they can be defined. <br /> <br />Progress.--Two hundred and seventeen maps were completed prior to fiscal year <br />1981. <br /> <br />Plans.--No work scheduled this year. <br /> <br />21 <br />